Do not remove feature flag in teardown in add_remove_ci_variable_spec
What does this MR do?
Do to remove feature flag in teardown in add_remove_ci_variable_spec
Also, add requries_admin
tag as this test enables a feature flag
On live environments, if two instances of this test are running and they both try to change the feature flag, this could lead to inconsistencies and flakiness.
Related to #214461 (closed)
Conformity
Edited by Sanad Liaquat